I'm sure they'll release in the North American market eventually. Remember, SCA, the parent company of Tena, is Swedish. It was inevitable that Europe would get them first.
You also have to consider that in some respects, Europe is a better market for non-ABDL incontinence products than the USA, as European state or quasi-state medical providers are generally better at providing care for chronic conditions. The American medical system, by comparison, is heavily biased towards providing high-quality acute care.